Abstract
The spectrum of amplification of terahertz radiation in a structured active graphene bilayer consisting of two identical periodic graphene microribbon arrays separated by a thin dielectric barrier layer is theoretically investigated. The system supports optical and acoustic plasmon modes. The resonant frequencies of the optical and acoustic modes change oppositely with the dielectric-layer thickness, which allows plasmon-mode anticrossing. It is shown that the investigated graphene structure is characterized by a strong plasmon response and giant terahertz-radiation amplification at plasma resonance frequencies in the vicinity of the anticrossing between the optical and acoustic plasmon modes at room temperature.
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This study was carried out in the framework of the state task and supported in part by the Russian Foundation for Basic Research, project no. 18-37-20004.
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Translated by E. Bondareva
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Polischuk, O.V., Fateev, D.V. & Popov, V.V. On the Amplification of Terahertz Radiation by High-Q Resonant Plasmons in a Periodic Graphene Bilayer under Plasmon-Mode Anticrossing. Semiconductors 53, 1211–1216 (2019). https://doi.org/10.1134/S106378261909015X
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DOI: https://doi.org/10.1134/S106378261909015X